Phase Equilibria in the Sn-Rich Corner of the Ni-Sb-Sn System

• DOI: 10.1007/s11664-012-2395-9
• Publication Date: 2013-01-30T18:24:15Z
• Authors: Ratikanta Mishra; Ales Kroupa; Adela Zemanova; Herbert Ipser
• Keywords: 104011 Materialchemie; 104011 Materials chemistry; 104017 Physical chemistry; 02 engineering and technology; 0210 nano-technology; 104003 Anorganische Chemie; 104017 Physikalische Chemie; 104003 Inorganic chemistry

Phase equilibria in the ternary Ni-Sb-Sn system are of interest for high-temperature soldering, both considering ternary alloys as solder materials themselves or as the basis for understanding the reactions between Sb-Sn-based solders and Ni-based substrates. Therefore, the Sn-rich corner of the ternary Ni-Sb-Sn phase diagram with Sn content of more than 75 at.% was investigated by a combination of powder x-ray diffraction (XRD), differential thermal analysis (DTA), and electron probe microanalysis (EPMA). Ternary phase equilibria and phase compositions of the respective equilibrium phases were determined within the isothermal section at 200A degrees C, and two isopleths were constructed for constant Sn contents of 80 at.% and 85 at.%. The experiments were supported by CALPHAD-type calculations of this ternary system to yield a consistent reaction scheme which shows four invariant ternary transition reactions in this composition range. A liquidus projection is presented, accompanied by the corresponding Scheil diagram.